| # Copyright © 2021 Amazon.com, Inc. or its affiliates. |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| if PICOLIBC |
| |
| config PICOLIBC_USE_MODULE |
| bool "Picolibc as module" if "$(TOOLCHAIN_HAS_PICOLIBC)" = "y" |
| default y if "$(TOOLCHAIN_HAS_PICOLIBC)" != "y" |
| depends on ZEPHYR_PICOLIBC_MODULE |
| depends on !GLIBCXX_LIBCPP |
| help |
| Use picolibc module instead of picolibc included with toolchain. |
| This is enabled by default for toolchains other than the Zephyr |
| SDK. |
| |
| # force TLS when using toolchain with TLS support |
| config PICOLIBC_USE_TOOLCHAIN |
| bool |
| default y if PICOLIBC && !PICOLIBC_USE_MODULE |
| select THREAD_LOCAL_STORAGE if ARCH_HAS_THREAD_LOCAL_STORAGE && TOOLCHAIN_SUPPORTS_THREAD_LOCAL_STORAGE |
| |
| config PICOLIBC_HEAP_SIZE |
| int "[DEPRECATED] Picolibc heap size (bytes)" |
| default -2 |
| help |
| [DEPRECATED] Use COMMON_LIBC_MALLOC_ARENA_SIZE |
| |
| Indicate the size in bytes of the memory arena used for common C |
| library malloc() implementation when using Picolibc. |
| |
| If set to -2, then the value of COMMON_LIBC_MALLOC_ARENA_SIZE |
| will be used. |
| |
| choice PICOLIBC_IO_LEVEL |
| prompt "Picolibc printf/scanf level" |
| default PICOLIBC_IO_MINIMAL if CBPRINTF_NANO |
| default PICOLIBC_IO_LONG_LONG if CBPRINTF_FULL_INTEGRAL |
| default PICOLIBC_IO_INTEGER |
| help |
| Selects the level of printf and scanf support |
| |
| config PICOLIBC_IO_FLOAT |
| bool "full support for integer/floating point values in printf/scanf" |
| help |
| Include full floating point and integer support in printf/scanf |
| functions. |
| |
| config PICOLIBC_IO_LONG_LONG |
| bool "full support for integer values, including long long, in printf/scanf" |
| depends on !REQUIRES_FLOAT_PRINTF && (!CBPRINTF_FP_SUPPORT || CBPRINTF_NANO) |
| help |
| Includes full integer with long long, but no floating |
| point in printf/scanf. |
| |
| config PICOLIBC_IO_INTEGER |
| bool "full support for integer values, other than long long, in printf/scanf" |
| depends on !REQUIRES_FLOAT_PRINTF && ((!CBPRINTF_FP_SUPPORT && !CBPRINTF_FULL_INTEGRAL) || CBPRINTF_NANO) |
| help |
| Include full integer other than long long, but no floating point |
| in printf/scanf. |
| |
| config PICOLIBC_IO_MINIMAL |
| bool "limited support for integer values in printf/scanf" |
| depends on !REQUIRES_FLOAT_PRINTF && CBPRINTF_NANO |
| help |
| Include limited integer and no floating point support in |
| printf/scanf. |
| |
| endchoice |
| |
| if PICOLIBC_USE_MODULE |
| |
| choice PICOLIBC_OPTIMIZATIONS |
| prompt "Optimization level" |
| default PICOLIBC_SIZE_OPTIMIZATIONS if SIZE_OPTIMIZATIONS |
| default PICOLIBC_SPEED_OPTIMIZATIONS if SPEED_OPTIMIZATIONS |
| default PICOLIBC_DEBUG_OPTIMIZATIONS if DEBUG_OPTIMIZATIONS |
| default PICOLIBC_NO_OPTIMIZATIONS if NO_OPTIMIZATIONS |
| help |
| Note that these flags shall only control the compiler |
| optimization level for picolibc, not the level for the |
| rest of Zephyr |
| |
| config PICOLIBC_SIZE_OPTIMIZATIONS |
| bool "Optimize for size" |
| help |
| Compiler optimizations will be set to -Os independently of other |
| options. |
| |
| config PICOLIBC_SPEED_OPTIMIZATIONS |
| bool "Optimize for speed" |
| help |
| Compiler optimizations will be set to -O2 independently of other |
| options. |
| |
| config PICOLIBC_DEBUG_OPTIMIZATIONS |
| bool "Optimize debugging experience" |
| help |
| Compiler optimizations will be set to -Og independently of other |
| options. |
| |
| config PICOLIBC_NO_OPTIMIZATIONS |
| bool "Optimize nothing" |
| help |
| Compiler optimizations will be set to -O0 independently of other |
| options. |
| |
| endchoice |
| |
| config PICOLIBC_FAST_STRCMP |
| bool "always use fast strcmp paths" |
| default y |
| help |
| This provides a faster strcmp version even when libc is |
| built in space-optimized mode |
| |
| config PICOLIBC_ASSERT_VERBOSE |
| bool "assert provides verbose information" |
| help |
| The usual picolibc assert helper, __assert_func, takes file, line, |
| function and expression information to make the presented message |
| more helpful. These all require storage in the image. Unselecting |
| this option eliminates all of that information, making the results |
| less helpful but also making them consume less memory. |
| |
| config PICOLIBC_IO_C99_FORMATS |
| bool "support C99 format additions in printf/scanf" |
| default y |
| help |
| Includes C99 printf and scanf support for j, z, t size |
| modifiers. C99 support is always included in the floating-point |
| variant |
| |
| config PICOLIBC_IO_POS_ARGS |
| bool "Support POSIX positional args (e.g. %$1d) in printf/scanf" |
| default y |
| depends on !PICOLIBC_IO_MINIMAL |
| help |
| Includes support for positional args (e.g. $1) in integer-only |
| printf and scanf. Positional args are always supported in the |
| floating-point variant. |
| |
| config PICOLIBC_IO_FLOAT_EXACT |
| bool "support for exact float/string conversion" |
| default y |
| help |
| Uses Ryu algorithm for exact binary/decimal float conversions. |
| This ensures that printf values with enough digits can be |
| fed to scanf and generate exactly the same binary value. |
| |
| config PICOLIBC_IO_SMALL_ULTOA |
| bool "avoid soft division in printf" |
| default y |
| help |
| Replaces division and modulus by 10 with shifts and adds when |
| doing binary to decimal conversion in printf for 64-bit |
| values on 32-bit targets. |
| |
| config PICOLIBC_IO_MINIMAL_LONG_LONG |
| bool "Include long long support in minimal printf" |
| depends on PICOLIBC_IO_MINIMAL |
| default y if CBPRINTF_FULL_INTEGRAL |
| help |
| Include long long support in the minimal picolibc printf code |
| |
| config PICOLIBC_LOCALE_INFO |
| bool "support locales in libc functions" |
| help |
| Includes code for basic locale support |
| |
| config PICOLIBC_LOCALE_EXTENDED_INFO |
| bool "support extended locales in libc functions" |
| help |
| Includes code for extended locale support |
| |
| config PICOLIBC_MULTIBYTE |
| bool "support multibyte functions in libc" |
| help |
| Includes code for multi-byte characters |
| |
| config PICOLIBC_PICOEXIT |
| bool "use smaller atexit/onexit implementation" |
| default y |
| help |
| Provides a simpler atexit/onexit implementation that doesn't use |
| malloc, but only supports a small number (32) of exit handlers. |
| |
| config PICOLIBC_MULTITHREAD |
| bool "support multiple threads using retargetable locking API" |
| default y |
| help |
| Protects shared data structures in libc with mutexes that use |
| an API which can be retargeted to OS provided routines. |
| |
| config PICOLIBC_GLOBAL_ERRNO |
| bool "use a single global variable for errno" |
| help |
| Picolibc usually uses a TLS variable for errno, ensuring that |
| multiple threads have a reliable mechanism for detecting libc |
| exceptions. This option switches to a single global errno variable, |
| which can be used to avoid TLS variable usage by the library if |
| necessary. |
| |
| endif # PICOLIBC_USE_MODULE |
| |
| endif # PICOLIBC |
